Magnetic and conductive Fe3O4-polyaniline nanoparticles with core-shell structure

Jianguo Deng, Chuan Lan He, Yuxing Peng, Jianhua Wang, Xingping Long, Pei Li, Albert S.C. Chan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

249 Citations (Scopus)

Abstract

Magnetic and conducting Fe3O4-polyaniline (PANI) nanoparticles with core-shell structure have been prepared in the presence of Fe3O4magnetic fluid in aqueous solution containing dodecylbenzene sulfonic acid sodium salt (NaDS) as a surfactant and dopant. The conductivity of the composites at room temperature depended on Fe3O4content and doping degree. The magnetic properties of the resulting composites showed ferromagnetic behavior, such as high-saturated magnetization (Ms=4.22-48.4emu/g) and high coercive force (Hc=8-55.3Oe). The saturated magnetization increased with the increasing Fe3O4content. A structural characterization by elemental analysis, Fourier transform infrared, transmission electron micrograph (TEM) and powder X-ray diffraction (XRD), proved that nanometer-sized Fe3O4(20-30nm) in the composites was attributed to the ferromagnetic behavior of the composites. The average size of Fe3O4-polyaniline nanoparticles with core-shell structure was about 80nm, and polydisperse. The results of TG, IR and UV spectra indicated that Fe3O4nanoparticles could improve the composite thermal stability possibly due to the interaction between Fe3O4particles and polyaniline backbone.
Original languageEnglish
Pages (from-to)295-301
Number of pages7
JournalSynthetic Metals
Volume139
Issue number2
DOIs
Publication statusPublished - 5 Sep 2003

Keywords

  • Conductivity
  • Core-shell structure
  • Ferromagnetic properties
  • Polyaniline

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Metals and Alloys
  • Materials Chemistry

Cite this